. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. 118 OLACIEKS OF THE POLAR WORLD. tho cascades, and mended at their bases. When two branch glaciers lay their sidtjs together, the regulation is so firm that they begin immediately to flow in the trunk glacier as in a single stream. The merlial moraine gives no indication by its slowness of motion that it is derived from the sluggish ice of t
. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. 118 OLACIEKS OF THE POLAR WORLD. tho cascades, and mended at their bases. When two branch glaciers lay their sidtjs together, the regulation is so firm that they begin immediately to flow in the trunk glacier as in a single stream. The merlial moraine gives no indication by its slowness of motion that it is derived from the sluggish ice of the sides of the branch glaciers. We may sum up tho regelation theory in few words. The ice of glaciers changes its form and retains its continuity imder pressure which keeps its particles together. But when subjected to tdtsion, sooner than stretch, it breeds, and behaves no longer as a viscous Ixirly. I'hese are Professor Tyndall's words, and the fact which they embody it would be difficult to set forth more clearly or more A I' OLACIEIt. Having said thus much of the struciture, causes, characteristics, and movement of glaciers, we proceed to consider some of the more remarkable of those which are situated in the Arctic World. The glaciers of the Polar Regions do not differ in structure or uiode of formation from those of other countries. Yet they possess some peculiar features, and to a superficial observer might seem independent of the physical laws we have attempted to explain. That this is not the case has been shown by Charles Martins, who carefully studied the glaciers of Spitzbergen on the cHJcasion of the exjiloring voyage of the Recherche to tliat island, and has demonstrated that their differences are but a j)articular case of the general phenomenon. As special characters he points out, firat, the rarity of needles and prisms of ice, which he. Please note that these images are extracted from scanned page images that may have been digitally enhanced f
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1876
